CN103045882A - Method for preparing aluminium praseodymium intermediate alloy in high-energy ultrasonic mode - Google Patents
Method for preparing aluminium praseodymium intermediate alloy in high-energy ultrasonic mode Download PDFInfo
- Publication number
- CN103045882A CN103045882A CN2012102463507A CN201210246350A CN103045882A CN 103045882 A CN103045882 A CN 103045882A CN 2012102463507 A CN2012102463507 A CN 2012102463507A CN 201210246350 A CN201210246350 A CN 201210246350A CN 103045882 A CN103045882 A CN 103045882A
- Authority
- CN
- China
- Prior art keywords
- praseodymium
- aluminium
- energy ultrasonic
- ultrasonic
- alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a method for preparing an aluminium praseodymium intermediate alloy in a high-energy ultrasonic mode. The method comprises the following steps of: (1) putting a pure aluminium ingot into a crucible to heat until the pure aluminium ingot is molten, coating rare-earth praseodymium particles by using an aluminium paper and pressing the rare-earth praseodymium particles into a pure aluminium melt to preserving the temperature for 30-40 minutes in the range of 745-765 DEG C, wherein the content of the rare-earth praseodymium occupies 20-25 percent of the total weight; (2) applying interval high-energy ultrasonic on a part which is at a distance of 10-15mm away from the lower part of the liquid surface of the alloy melt, wherein the ultrasonic intensity is 0.5kw/cm<2>-0.7kw/cm<2>, wherein the ultrasonic application time is 8-15 minutes, the application time of the high-energy ultrasonic every time is 30-50 seconds, and the interval time is 30-50 seconds; and (3) reducing the temperature of the alloy melt to be 700-710 DEG C, refining, removing impurities and pouring. The method is relatively low in melting temperature, stable in rare-earth content, simple in process, safe and reliable, convenient to operate and uniform in obtained alloy components, and reduces energy consumption and segregation.
Description
Technical field
The present invention relates to a kind of preparation method of rare earth alloy, relate in particular to the method that a kind of high-energy ultrasonic prepares aluminium praseodymium master alloy.
Background technology
The aluminium rare earth intermediate alloy is a kind of efficient fining modifier, has good refinement modification effect, is widely used in rotten processing of refinement of aluminium and alloy thereof, and significantly the refinement alloy structure improves alloy mechanical property.In long-term research, people constantly explore the preparation method of Al-RE intermediate alloys, the production method of preparation rare earth aluminium alloy is roughly summarized at present following two kinds: 1, direct fusion process: be that rare earth or norium are joined in the high temperature aluminum liquid by a certain percentage, make master alloy.Be characterized in easy to operate, the alloying constituent stable content.Shortcoming is exactly to cause easily the alloying constituent segregation, causes the local part overrich, disperses the defectives such as inhomogeneous.2, fused salt electrolysis process: in electrolytic furnace, as ionogen, electrolysis makes Al-RE intermediate alloys in aluminium liquid with Repone K, rare earth oxide and rare earth chloride etc.In industrial aluminum electrolysis bath, directly add rare earth compound, make Al-RE intermediate alloys by electrolysis.But can produce toxic gas in electrolytic process, contaminate environment is detrimental to health.In addition, alloying constituent is difficult to control, and fluctuation range is larger.The present invention is in the directly basis introducing high-energy ultrasonic processing of fusion process, utilizes the sound cavitation effect of high-energy ultrasonic and acoustic streaming effect to make the master alloy homogeneous chemical composition that makes, and prevents segregation.
Summary of the invention
The object of the present invention is to provide a kind of high-energy ultrasonic to prepare the method for aluminium praseodymium master alloy, its prepared master alloy content of rare earth is stable, and alloying constituent is even, the low and simple characteristics of preparation process of cost.
The present invention is achieved like this, and a kind of high-energy ultrasonic prepares the method for aluminium praseodymium master alloy, it is characterized in that described preparation method may further comprise the steps:
(1) at first the fine aluminium ingot is put into crucible and be heated to fusing, be that the praseodymium particle of 20-100um wraps up with aluminium-foil paper with diameter, be pressed in the above-mentioned melt, be incubated 30～40 minutes in 745 ℃～765 ℃ scopes, wherein praseodymium content is to account for 20～25% of gross weight;
(2) the 10-15mm place applies the intermittent type high-energy ultrasonic under above-mentioned alloy melt liquid level, and ultrasound intensity is 0.5kw/cm
2～0.7kw/cm
2
(3) ultrasonic application time is 8～15min, the each application time of high-energy ultrasonic 30～50 seconds, 30～50 seconds intermittent times;
(4) then alloy melt is down to 700 ℃ ~ 710 ℃ refining removal of impurities and pouring into a mould;
The purity of described praseodymium is 99.9%.
Technique effect of the present invention is: the present invention so smelting temperature is lower, can effectively avoid the rare earth scaling loss because the employing alloying constituent is eutectic composition, thereby content of rare earth is stable, and reduces energy consumption.And technique is simple, safe and reliable, easy to operate, produces without obnoxious flavour.The employing high-energy ultrasonic is processed, and guarantees that alloying constituent is even, reduces segregation.
Description of drawings
Fig. 1 is the aluminium praseodymium master alloy microstructure metallograph that the present invention prepares.
Embodiment
Embodiment 1: at first the fine aluminium ingot being put into crucible and be heated to fusing, is that 20-100um praseodymium particle wraps up with aluminium-foil paper with diameter, is pressed in the above-mentioned melt, and 745 ℃ of insulations 30 minutes, wherein praseodymium content accounted for 20% of gross weight; The purity of described praseodymium is 99.9%.The 10mm place applies the intermittent type high-energy ultrasonic under above-mentioned alloy melt liquid level, and ultrasound intensity is 0.5kw/cm
2, application time is 8min, the each application time of high-energy ultrasonic 30 seconds, then is down to alloy melt 700 ℃ of refining removal of impurities and is poured into a mould at 30 seconds intermittent times.
Embodiment 2: at first the fine aluminium ingot being put into crucible and be heated to fusing, is that 20-100um praseodymium particle wraps up with aluminium-foil paper with diameter, is pressed in the above-mentioned melt, and 755 ℃ of insulations 40 minutes, wherein praseodymium content accounted for 25% of gross weight; The purity of described praseodymium is 99.9%.The 15mm place applies the intermittent type high-energy ultrasonic under above-mentioned alloy melt liquid level, and ultrasound intensity is 0.6kw/cm
2, application time is 12min, the each application time of high-energy ultrasonic 40 seconds, then is down to alloy melt 710 ℃ of refining removal of impurities and is poured into a mould at 40 seconds intermittent times.
Embodiment 3: at first the fine aluminium ingot being put into crucible and be heated to fusing, is that 20-100um praseodymium particle wraps up with aluminium-foil paper with diameter, is pressed in the above-mentioned melt, and 765 ℃ of insulations 40 minutes, wherein praseodymium content accounted for 20% of gross weight; The purity of described praseodymium is 99.9%.The 15mm place applies the intermittent type high-energy ultrasonic under above-mentioned alloy melt liquid level, and ultrasound intensity is 0.7kw/cm
2, application time is 15min, the each application time of high-energy ultrasonic 50 seconds, then is down to alloy melt 710 ℃ of refining removal of impurities and is poured into a mould at 50 seconds intermittent times.
Can find out very even that eutectic structure distributes in the aluminium praseodymium master alloy tissue.When ultrasonic wave imports alloy melt, many non-linear effects will appear in the propagation of sound wave, wherein main manifestations is cavitation and acoustic streaming effect, the local heating of whole heating, boundary in stirring in the mechanics effect that cavitation and acoustic streaming cause, dispersion, impact fracture and the calorifics effect, significantly improve the wettability of praseodymium in the fine aluminium liquation, so that can be dispersed in uniformly in the aluminum solutions through the praseodymium in the aluminium praseodymium master alloy of high-energy ultrasonic processing, eliminate component segregation.Adopt the intermittent type high-energy ultrasonic to process and effectively to control speed of reaction, further make alloying constituent even, also can reduce the oxidization burning loss in the reaction process.Thereby prepared aluminium praseodymium master alloy stable components, oxide inclusion and component segregation are few.
In sum, also can be as seen from the figure, adopt in the tissue of the aluminium praseodymium master alloy that the present invention obtains eutectic structure tiny and be evenly distributed, and technique is simple, safe and reliable, easy to operate.
Claims (2)
1. a high-energy ultrasonic prepares the method for aluminium praseodymium master alloy, it is characterized in that described preparation method may further comprise the steps:
(1) at first the fine aluminium ingot is put into crucible and be heated to fusing, be that the praseodymium particle of 20-100um wraps up with aluminium-foil paper with diameter, be pressed in the above-mentioned melt, be incubated 30～40 minutes in 745 ℃～765 ℃ scopes, wherein praseodymium content is to account for 20～25% of gross weight;
(2) the 10-15mm place applies the intermittent type high-energy ultrasonic under above-mentioned alloy melt liquid level, and ultrasound intensity is 0.5kw/cm
2～0.7kw/cm
2
(3) ultrasonic application time is 8～15min, the each application time of high-energy ultrasonic 30～50 seconds, 30～50 seconds intermittent times;
(4) then alloy melt is down to 700 ℃ ~ 710 ℃ refining removal of impurities and pouring into a mould.
2. a kind of high-energy ultrasonic as claimed in claim 1 prepares the method for aluminium praseodymium master alloy, it is characterized in that described praseodymium purity is 99.9%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102463507A CN103045882A (en) | 2012-07-17 | 2012-07-17 | Method for preparing aluminium praseodymium intermediate alloy in high-energy ultrasonic mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102463507A CN103045882A (en) | 2012-07-17 | 2012-07-17 | Method for preparing aluminium praseodymium intermediate alloy in high-energy ultrasonic mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103045882A true CN103045882A (en) | 2013-04-17 |
Family
ID=48058741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102463507A Pending CN103045882A (en) | 2012-07-17 | 2012-07-17 | Method for preparing aluminium praseodymium intermediate alloy in high-energy ultrasonic mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103045882A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451489A (en) * | 2013-08-16 | 2013-12-18 | 南昌大学 | Rare-earth element samarium alloying aluminum-silicon alloy and preparation method thereof |
| CN103924106A (en) * | 2014-03-21 | 2014-07-16 | 南昌大学 | Preparation method of aluminum praseodymium holmium ternary intermediate alloy |
| CN104152733A (en) * | 2014-09-01 | 2014-11-19 | 南昌大学 | Method for manufacturing high-performance cerium praseodymium aluminum alloy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU456027A1 (en) * | 1972-11-02 | 1975-01-05 | Институт Металлургии Имени А.А.Байкова | Magnesium based alloy |
| CN102134667A (en) * | 2011-02-28 | 2011-07-27 | 江苏中欧材料研究院有限公司 | Preparation method of submicron particle-reinforced aluminum-based composite material |
| CN102220505A (en) * | 2011-06-16 | 2011-10-19 | 南昌大学 | Method for preparing magnesium-lanthanum master alloy by high-intensity ultrasound |
-
2012
- 2012-07-17 CN CN2012102463507A patent/CN103045882A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU456027A1 (en) * | 1972-11-02 | 1975-01-05 | Институт Металлургии Имени А.А.Байкова | Magnesium based alloy |
| CN102134667A (en) * | 2011-02-28 | 2011-07-27 | 江苏中欧材料研究院有限公司 | Preparation method of submicron particle-reinforced aluminum-based composite material |
| CN102220505A (en) * | 2011-06-16 | 2011-10-19 | 南昌大学 | Method for preparing magnesium-lanthanum master alloy by high-intensity ultrasound |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451489A (en) * | 2013-08-16 | 2013-12-18 | 南昌大学 | Rare-earth element samarium alloying aluminum-silicon alloy and preparation method thereof |
| CN103451489B (en) * | 2013-08-16 | 2016-01-20 | 南昌大学 | A kind of Samarium Nitrate alloying aluminum silicon alloy and preparation method |
| CN103924106A (en) * | 2014-03-21 | 2014-07-16 | 南昌大学 | Preparation method of aluminum praseodymium holmium ternary intermediate alloy |
| CN104152733A (en) * | 2014-09-01 | 2014-11-19 | 南昌大学 | Method for manufacturing high-performance cerium praseodymium aluminum alloy |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102912161A (en) | Method for preparing aluminum cerium intermediate alloy through high-intensity ultrasound | |
| CN102513721B (en) | A kind of high-strength aluminum alloy solder for brazing at medium temperature and preparation method thereof | |
| CN102220505A (en) | Method for preparing magnesium-lanthanum master alloy by high-intensity ultrasound | |
| CN104722945A (en) | Ultra-fine grain aluminum alloy gold welding wire and preparation method thereof | |
| CN103045911A (en) | Method for preparing aluminum-yttrium intermediate alloy by using high intensity ultrasonic | |
| CN104561704A (en) | Process for producing large-size 7055 aluminum alloy round ingot | |
| CN104928516B (en) | Zirconium refinement method for magnesium alloy crystalline grains | |
| CN103614580B (en) | A kind of method of efficient melting Galfan alloy | |
| CN105543528A (en) | Method for directly producing 6xxx-series aluminum alloy from high silicon electrolytic aluminum liquid | |
| CN104213001A (en) | Low-manganese aluminum alloy for cathode foil and preparation method thereof | |
| CN102220523A (en) | Method for preparing aluminum-lanthanum intermediate alloy by using high-intensity ultrasound | |
| CN103045882A (en) | Method for preparing aluminium praseodymium intermediate alloy in high-energy ultrasonic mode | |
| CN103938002B (en) | A kind of Cu-Cr-Zr alloy casting rod reduces the vacuum melting technique of segregation | |
| CN105671348A (en) | Preparation method for efficient aluminum alloy refining agent | |
| CN101591737B (en) | Zinc-aluminum-titanium-carbon intermediate alloy refiner, preparation method thereof and use thereof | |
| CN102367534B (en) | A kind of method of preparing cast aluminum alloy with composite grain refiner | |
| CN104711440A (en) | Preparation technique of aluminum-strontium alloy modifier | |
| CN103540805A (en) | Method for preparing aluminum-holmium intermediate alloy by virtue of high-energy ultrasonic | |
| CN102776400A (en) | Method for preparing aluminum gadolinium intermediate alloy by using high intensity ultrasonic | |
| CN104726750B (en) | A kind of preparation technology of the al-sr alloy alterant being applicable to cast Al-Si alloy | |
| CN104195359B (en) | A kind of high Mn content aluminum manganese intermediate alloy and preparation method thereof | |
| CN102220504A (en) | Method for preparing aluminum-samarium master alloy by high-intensity ultrasound | |
| CN103451491A (en) | Rare-earth element europium alloying aluminum-silicon alloy and preparation method thereof | |
| CN102776394A (en) | Method for preparing aluminum neodymium intermediate alloy with high-intensity ultrasound | |
| CN102409209A (en) | Method for compositely refining AZ31 magnesium alloy crystal particles by ultrasound field and refining agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130417 |